Here is a document that I have been given permission to post onto the site by the owner that should provide some help and information on the SU Carburetor. The original document was posted on the Triumph Experience Car Forums by the author in the Spitfire & GT6 Forum post "SU Carb Surging" [here is the link to the original document location: http://www.triumphexp.com/phorum/read.p ... msg-943288 ].
This is some good information and understandable even for me.
